平行划线器，上面有标尺，前端划针是一根钢制的，用螺丝可以夹紧。也可改造成用圆珠笔芯当做划针，用来平行划线。这样从标准桐木板上裁出长方木条或木片就更快些了
Parallel scriber, above the ruler, the front plank is a steel, with a screw can be clamped. Can also be transformed into using a ballpoint pen as a needle, used to parallel crossed. This cut out from the standard Tongmu rectangular strips of wood or chips faster even more